Fake aquarium plants?

Just take them out and rub as much as possible off with your hands or a towel. Running hot water over them helps too.

MM

When algae builds up faster than the algae eaters can keep up then add more algae eaters or periodically clean the plants by hand with fresh water; safe and simple. Do not use any cleaners.

Pull them out, and wash them with tap water, using your fingers to rub off the algae.

Dry them off with a paper towel and put them back in the tank.

You don't need to use cleaners on them.

However, an algae outbreak is usually a sign of your nitrate levels in your tank being too high so you might want to look into that. You can get test kits at most pet shops that sell fish stuff.

Since they're fake, you can just take them out and scrub them with a CLEAN toothbrush and water. You should be able to get them completely clean this way.

If you have stubborn spots, you can use normal, household bleach (not gel or anything), but make sure that you use a lot of dechlorinator in with the plants before returning them to the tank, and it's really best to NOT use the chemicals unless absolutely necessary.